// Wormz.java - from members.aol.com/wmjbkr's drawbots2

import java.applet.Applet;
import java.awt.*;
import java.util.Vector;

public class Wormz  extends Applet  implements Runnable {
   public void start ()
   {  if (_thr == null) {_thr = new Thread (this);  _thr.start ();}  }

   public void stop ()
   {  if (_thr != null)  {_thr.stop ();  _thr = null;}  }

   public void run ()
   { long l = System.currentTimeMillis ();
      _thr.setPriority (1);
      while (_thr != null) {
         try {
            l += 2;
            Thread.sleep (Math.max (0L, l - System.currentTimeMillis ()));
         }
         catch (InterruptedException interruptedexception) {}
         repaint ();
      }
   }

   public Wormz ()
   {  _thr    = null;
      _nPal   = 4096;
      _bg     = new Color (7, 7, 7);
      _nWormz = 0;
      _wormz  = new Vector (10, 1);
   }

   public void init ()
   {  _w = size ().width;   _h = size ().height;
      setBackground (_bg);
      _pal = new Color [_nPal];
     float f  = 0.0F;
     float f1 = (float)(1.0D / (double)_nPal);
      for (int i = 0; i < _nPal; i++)
         {_pal [i] = Color.getHSBColor (f, 1.0F, 1.0F);   f += f1;}
      _pxlGot = new boolean [_w * _h];
      for (int j = 0; j < _w * _h; j++)  _pxlGot [j] = false;
   }

   public void paint (Graphics g)
   {  for (int l = 0; l < _nWormz; l++) {
         _curWorm = (Worm) _wormz.elementAt (l);
         _curWormNum = l;
        int l1 = _curWorm._color;
         if (_curWorm._growing)  g.setColor (_pal [l1]);
         else                    g.setColor (Color.black);
         for (int i2 = 0; i2 < _curWorm._nPxlDraw; i2++) {
           int j2 = _curWorm._pxlDraw [i2].x;
           int k2 = _curWorm._pxlDraw [i2].y;
            g.drawLine (j2, k2, j2, k2);
         }
         if (_curWorm._died) {_wormz.removeElement (_curWorm);   _nWormz--;}
         else                {_curWorm.next ();}
      }
   }

   public void update (Graphics g)   {paint (g);}

   public boolean mouseDown (Event event, int x, int y)
   {  _tstWorm = new Worm (x, y, this);
      if (_tstWorm.canAdd (x, y, _tstWorm._growDir))
           {_wormz.addElement (_tstWorm);   _nWormz++;   return true;}
      else {_tstWorm = null;   return false;}
   }

   Thread  _thr;
   int     _w, _h, _nPal, _nWormz, _curWormNum;
   Color   _pal [], _bg;
   Worm    _tstWorm, _curWorm;
   Vector  _wormz;
   boolean _pxlGot [];
}